WASHINGTON (AP) -- Space is vast, but it may not be so lonely after all: A study finds the Milky Way is teeming with billions of planets that are about the size of Earth, orbit stars just like our sun, and exist in the Goldilocks zone -- not too hot and not too cold for life.

Astronomers using NASA data have calculated for the first time that in our galaxy alone, there are at least 8.8 billion stars with Earth-size planets in the habitable temperature zone.

STAVANGER, Norway (AP) -- Residents of the small Norwegian town of Rjukan have finally seen the light.

Tucked in between steep mountains, the town is normally shrouded in shadow for almost six months a year, with residents having to catch a cable car to the top of a nearby precipice to get a fix of midday vitamin D.

NASA's Goddard Space Flight Center combined two days of satellite data to release a spectacularly trippy video Thursday of a "magnetic filament of solar material" that erupted on the Sun in late September.

SAN FRANCISCO (AP) -- The governors of eight states including California and New York pledged Thursday to work together to create charging stations and other fueling infrastructure needed to get 3.3 million zero-emission vehicles on those states' roadways by 2025 to curb greenhouse gas pollution.

SAN FRANCISCO (AP) -- Apple Inc. is refreshing its iPad lineup and slashing the price of its Mac computers ahead of the holiday shopping season, as it faces an eroding tablet market share and growing competition from rival gadget makers.

Apple unveiled a new, thinner, lighter tablet called the "iPad Air" along with a slew of new Macs Tuesday at an event in San Francisco. The iPad Air weighs just 1 pound, compared with 1.4 pounds for the previous version. Apple marketing chief Phil Schiller called the tablet a "screaming fast iPad." He said it is eight times faster than the original iPad that came out in 2010.

RICHMOND, Va. (AP) -- Clicking "Like" on Facebook is constitutionally protected free speech and can be considered the 21st century-equivalent of a campaign yard sign, a federal appeals court ruled Wednesday.